Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.
Вивчайте Challenge: Division int and double | Introduction
C++ Data Types

bookChallenge: Division int and double

We will not stop on most operations since they work as expected. Instead, let's look at the reasons behind the incorrect result obtained from the division operation. Those are explained in a video below:

It's not just a problem limited to division. When you use operators such as +, -, *, or / on variables of certain types, the resulting value will have the same type as the operands.

It's important to be mindful of these possibilities and take them into account.

Завдання

Swipe to start coding

Imagine you're building a taxi meter program: the GPS gives a fractional distance (12.7 km), but the meter rounds it down to a whole number. You need to write a function that calculates the customer's fare.

  1. Use the existing function calculatePayment, which has a return type of int and two parameters:
    • double distance_km — traveled distance.
    • int rate_per_km — price per kilometer.
  2. Multiply distance_km by 1 to convert it to an int and assign the result to the variable distance_km_int.
  3. Declare a type for payment_exact that should store an integer value.
  4. Multiply the distance by the rate per kilometer and assign the result to payment_exact.
  5. Return the result.

Рішення

solution.cpp

solution.cpp

Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 1. Розділ 3
single

single

Запитати АІ

expand

Запитати АІ

ChatGPT

Запитайте про що завгодно або спробуйте одне із запропонованих запитань, щоб почати наш чат

close

Awesome!

Completion rate improved to 4.35

bookChallenge: Division int and double

Свайпніть щоб показати меню

We will not stop on most operations since they work as expected. Instead, let's look at the reasons behind the incorrect result obtained from the division operation. Those are explained in a video below:

It's not just a problem limited to division. When you use operators such as +, -, *, or / on variables of certain types, the resulting value will have the same type as the operands.

It's important to be mindful of these possibilities and take them into account.

Завдання

Swipe to start coding

Imagine you're building a taxi meter program: the GPS gives a fractional distance (12.7 km), but the meter rounds it down to a whole number. You need to write a function that calculates the customer's fare.

  1. Use the existing function calculatePayment, which has a return type of int and two parameters:
    • double distance_km — traveled distance.
    • int rate_per_km — price per kilometer.
  2. Multiply distance_km by 1 to convert it to an int and assign the result to the variable distance_km_int.
  3. Declare a type for payment_exact that should store an integer value.
  4. Multiply the distance by the rate per kilometer and assign the result to payment_exact.
  5. Return the result.

Рішення

solution.cpp

solution.cpp

Switch to desktopПерейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів
Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 1. Розділ 3
single

single

some-alt